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Finding the Fourth Proportional to 16,940.30, 25,405.59 and 11,778.98

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Solution

The fourth proportional to 16,940.30, 25,405.59 and 11,778.98 is: 17,665.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,940.30 : 25,405.59 = 11,778.98 : x
  2. Step 2: Convert to fraction form
    16,940.30/25,405.59 = 11,778.98/x
  3. Step 3: Cross multiply
    16,940.30x = 25,405.59 × 11,778.98
  4. Step 4: Simplify right side
    16,940.30x = 299,251,936.50
  5. Step 5: Solve for x
    x = 299,251,936.50/16,940.30
  6. Step 6: Final answer
    x = 17,665.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.